Multi-redox phenazine/non-oxidized graphene/cellulose nanohybrids as ultrathick cathodes for high-energy organic batteries
作者机构：Department of Materials Science and EngineeringAdvanced Battery CenterKorea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea Department of Materials Science and EngineeringChungnam National UniversityDaejeon34134Republic of Korea Thin Film Materials Research CenterKorea Research Institute of Chemical Technology(KRICT)Daejeon34114Republic of Korea Department of Materials Science and EngineeringSeoul National UniversitySeoul08826Republic of Korea
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2021年第14卷第5期
页 面：1382-1389页
核心收录：
学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术]
基 金：This research was supported by Creative Materials Discovery Program(2017M3D1A1039558) Nano-Material Technology Development Program(NRF-2016M3A7B4900119)through the National Research Foundation of Korea(NRF) funded by the Ministry of Science,ICT and Future Planning(MSIP) This work was also supported by the NRF of the Korea Government(MSIP)under Grant 2016R1E1A1A01943131
主 题：energy storage organic electrodes batteries graphene cellulose nanofibers
摘 要：Various redox-active organic molecules can serve as ideal electrode materials to realize sustainable energy storage systems. Yet, to be more appropriate for practical use, considerable architectural engineering of an ultrathick, high-loaded organic electrode with reliable electrochemical performance is of crucial importance. Here, by utilizing the synergetic effect of the non-covalent functionalization of highly conductive non-oxidized graphene flakes (NOGFs) and introduction of mechanically robust cellulose nanofiber (CNF)-intermingled structure, a very thick (≈ 1 mm), freestanding organic nanohybrid electrode which ensures the superiority in cycle stability and areal capacity is reported. The well-developed ion/electron pathways throughout the entire thickness and the enhanced kinetics of electrochemical reactions in the ultrathick 5,10-dihydro-5,10-dimethylphenazine/NOGF/CNF (DMPZ-NC) cathodes lead to the high areal energy of 9.4 mWh·cm−2 (= 864 Wh·kg−1 at 158 W·kg−1). This novel ultrathick electrode architecture provides a general platform for the development of the high-performance organic battery electrodes.
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